You can transfer funds from one vault wallet (cold storage) to another vault wallet on Coinbase Prime. To deposit funds:
From the portfolio tab, search for the asset.
Click the asset to open the asset page.
Under Vault Balance, click Deposit.
Click Transfer within Vault.
Select the portfolio and wallet you’ll be transferring from.
Enter the amount.
Click Preview Transfer.
Review the details then click Initiate Transfer.
Verify your identity using a physical security key.
This action may require additional consensus approvals before it’s processed.
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